diff --git a/lib/fluent/version.rb b/lib/fluent/version.rb
index 54f2b1ea99..d69cc5e64d 100644
--- a/lib/fluent/version.rb
+++ b/lib/fluent/version.rb
@@ -16,6 +16,6 @@
 
 module Fluent
 
-  VERSION = '1.2.4'
+  VERSION = '1.2.5.rc1'
 
 end